Gentherm To Feature Prototype Thermoelectric Cartridge for
Waste Heat Recovery At Frankfurt International Motor Show

NORTHVILLE, MI and ODELZHAUSEN, Germany--Sept. 11, 2013: Gentherm
Incorporated , the global market leader and a developer of innovative
thermal management technologies, announced today it will feature its latest
thermoelectric generator cartridge design for converting waste heat to
electrical energy at the 65th annual International Motor Show September
10-13 in Frankfurt, Germany in Hall 4.1, Booth D23.

Gentherm is leading a U.S. Department of Energy (DOE)-funded project to
develop a solution for capturing automobile waste exhaust heat and
converting it to electrical energy to power electrical systems within the
vehicle and to improve fuel economy. Partnering with Gentherm is Tenneco, a
global developer of clean air and ride performance products and systems for
the automotive industry, and two global vehicle manufacturers.

The project calls for Gentherm to supply modular, cylindrical-shaped
thermoelectric cartridges that convert waste heat from the exhaust into
electricity. Tenneco then integrates the cartridges inside a thermoelectric
generator (TEG) that includes a unique heat exchanger. Tenneco will be
displaying the complete TEG at its booth in Hall 5.1, Stand A16.

"Our new TEG cartridge design is the result of several years of research
with the DOE and other important partners," said Gentherm President and
Chief Executive Officer Daniel R. Coker. "We believe it is a breakthrough
technology that has applications in a variety of global industries, but
especially for automobiles in terms of reducing CO2 emissions, improving
fuel economy and providing a new source of much-needed electricity. We are
now working closely with Tenneco to integrate our thermoelectric cartridges
into a new and innovative exhaust system design."

In a typical internal combustion engine, approximately 30 percent of the
fuel energy is used for actual vehicle propulsion, while more than 70
percent is lost, about half of it through the vehicle's exhaust system.
Thermoelectric generators help capture a portion of the lost energy,
convert it to electricity and redistribute it to electrical systems in the
vehicle, which can ultimately support improved fuel efficiency.

Inside the new TEG system, thermoelectric material is sandwiched
together within the cartridges and exposed to hot exhaust gas on one side
and to engine coolant on the other side. The temperature gradient over the
thermoelectric material results in an electrical current flow, which is
then redistributed to the vehicle. The cartridges use semiconductor
materials that are abundant and environmentally benign. "The modular design
of the TEG cartridges enables packaging scalability depending on vehicle
design, making it more cost-effective to integrate into the vehicle's
exhaust system," said Dr. Dmitri Kossakovski, Gentherm's R&D director and
leader of the power generation team located in Azusa, California.

The U.S. DOE consortium anticipates that initial demonstrators will be
available in 2014.